CVE-2026-78147 ggml-org llama.cpp ggml-RPC Server ggml-rpc.cpp deserialize_tensor deserialization
Remote attackers can exploit unsafe deserialization in the llama.cpp RPC server to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78147?
CVE-2026-78147 is a medium-severity unsafe deserialization vulnerability in ggml-org llama.cpp, published on 23 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in ggml-org llama.cpp bec4772f6. The impacted element is the function deserialize_tensor of the file ggml/src/ggml-rpc/ggml-rpc.cpp of the component ggml-RPC Server. Performing a manipulation of the argument op/op_params results in deserialization. The attack may be initiated remotely. This vulnerability is distinct from CVE-2026-34159 (GHSA-j8rj-fmpv-wcxw, PR #20908), which only added a buffer==nullptr rejection in create_node() and does not validate op or op_params. The reported GitHub issue was closed automatically due to inactivity.
Which versions are affected by CVE-2026-78147?
How do I fix CVE-2026-78147?
No fix has been published for CVE-2026-78147 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-78147 being exploited?
There is no known exploitation of CVE-2026-78147 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-78147, GHSA-f4vj-w5xq-5xph, UBUNTU-CVE-2026-78147.